编程学习网为您整理以下代码实例，主要实现：C语言isgraph()库函数，希望可以帮到各位朋友。
#include <stdio.h>
#include <ctype.h>
int main () {
int var1 = '3';
int var2 = 'm';
int var3 = ' ';
if( isgraph(var1) ) {
printf("var1 = |%c| can be printed\n", var1 );
} else {
printf("var1 = |%c| can't be printed\n", var1 );
}
if( isgraph(var2) ) {
printf("var2 = |%c| can be printed\n", var2 );
} else {
printf("var2 = |%c| can't be printed\n", var2 );
}
if( isgraph(var3) ) {
printf("var3 = |%c| can be printed\n", var3 );
} else {
printf("var3 = |%c| can't be printed\n", var3 );
}
return(0);
}
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